202110020012121 has 16 divisors (see below), whose sum is σ = 290504487697536. Its totient is φ = 124248870562176.

The previous prime is 202110020012041. The next prime is 202110020012161. The reversal of 202110020012121 is 121210020011202.

It is not a de Polignac number, because 202110020012121 - 2¹⁵ = 202110019979353 is a prime.

It is a super-2 number, since 2×202110020012121² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202110020012121.

It is not an unprimeable number, because it can be changed into a prime (202110020012161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2635927180 + ... + 2636003853.

It is an arithmetic number, because the mean of its divisors is an integer number (18156530481096).

Almost surely, 2^{202110020012121} is an apocalyptic number.

It is an amenable number.

202110020012121 is a deficient number, since it is larger than the sum of its proper divisors (88394467685415).

202110020012121 is a wasteful number, since it uses less digits than its factorization.

202110020012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5271932032.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 202110020012121 its reverse (121210020011202), we get a palindrome (323320040023323).

The spelling of 202110020012121 in words is "two hundred two trillion, one hundred ten billion, twenty million, twelve thousand, one hundred twenty-one".